diff --git a/sources/SloCovidServer/Test/SloCovidServer.Test/SloCovidServer.Test.csproj b/sources/SloCovidServer/Test/SloCovidServer.Test/SloCovidServer.Test.csproj
index 1027be1..de0318c 100644
--- a/sources/SloCovidServer/Test/SloCovidServer.Test/SloCovidServer.Test.csproj
+++ b/sources/SloCovidServer/Test/SloCovidServer.Test/SloCovidServer.Test.csproj
@@ -14,7 +14,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="NSubstitute" Version="5.1.0" />
+    <PackageReference Include="NSubstitute" Version="5.3.0" />
   </ItemGroup>
 
   <ItemGroup>